Shut off temp with RK2

[jacksparrow7]

Aloha all, I am using a Reefkeeper2 for my MH lights, I have the ability to have the MH (400w over a 90g pent) to shut off if the temp reaches to high. At the present time I keep my tank at 79 and was wondering what max saftey temp I should set my RK2 at to shut off my MH's? It's a mixed tank right now but mostly SPS,LPS and a few fish.

Mahalo all Jack

 

[Toddrtrex]

I have mine set up so that my clip on fan over my sump comes on when the temp hits 80.5 ( and shuts off at 79.5 ) I have the cut off temp for my MH at 84, the fan for the MH hood shuts off at 85. I have the fan's cut off higher so that it would cool down the heat the hood produces longer.

HTH.